3978 MTD Lawn Mower - Overview

Models starting with 3978

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Parts for models starting with 3978

Grip

Part #: HD9109054

Manufacturer Part #: 720-0223

$18.84

Screw-hex 7/16-20

Part #: HD9088643

Manufacturer Part #: 710-0314

$5.90

Key-sq 1/4 X 2.00

Part #: HD9153747

Manufacturer Part #: 914-0114

$5.95

Nut-hex 1/4-20

Part #: HD9153463

Manufacturer Part #: 912-0287

DISCONTINUED

Part #: HD9402890

Manufacturer Part #: 714-0149B

$5.95

Hex Ins. Jam L-Nut 5/16-24 Thd.

Part #: HD9164522

Manufacturer Part #: 912-0273

$6.02

Gear-Bevel

Part #: HD9107550

Manufacturer Part #: 717-0757

Trimmer Bearing Flange

Part #: HD9166214

Manufacturer Part #: 941-0336

$12.88

Hex Bolt 3/8-24 x 1.5" Lg.

Part #: HD9087059

Manufacturer Part #: 710-0459A

This is an authentic replacement part designed for use with a variety of lawn and garden equipment. This is a standard hardware with multiple uses based on your equipment. When checking for correct ap...

$8.51

Screw-hex Wash Hd

Part #: HD9085761

Manufacturer Part #: 710-0227

This is a genuine OEM sourced replacement screw which is commonly utilized on lawn and garden equipment. It is a standard hardware which has multiple applications based on the model of your unit, plea...

$5.95